Scheduling of PDSCH transmission with DFT-s-OFDM waveform

Abstract

An approach is described for a wireless communication for a fifth generation (5G) or new radio (NR) system. The wireless communication includes a gNode (gNB) configured to indicate a time domain resource allocation within one Discrete Fourier Transform (DFT) size in a downlink control information (DCI), and to transmit a physical downlink shared channel (PDSCH) with a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform in accordance with the time domain resource allocation within the one DFT size.

What is claimed is: 
     
       1. A method of wireless communication, the method comprising:
 indicating, by a base station (BS), a time domain resource allocation within one Discrete Fourier Transform (DFT) size in a downlink control information (DCI), wherein the one DFT size equals a number of subcarriers allocated for transmission within one Orthogonal Frequency Division Multiplexing (OFDM) symbol; and 
 transmitting, by the BS and following a DFT operation, a physical downlink shared channel (PDSCH) with a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform in accordance with the time domain resource allocation within the one DFT size, 
 wherein the method further comprises: 
 multiplexing, by the BS, a plurality of PDSCHs for one or more user equipments (UEs) in a time division multiplexing (TDM) manner; 
 performing, by the BS, the DFT operation on the multiplexed plurality of PDSCHs, 
 wherein the BS performs a multiple-step resource allocation for the plurality of PDSCHs with the DFT-s-OFDM waveform, 
 wherein prior to performing the DFT operation, determining, by the BS, a time resources allocation of modulated symbols for PDSCH transmission within the one DFT size, and determining, by the BS, a frequency domain resource allocation and resource mapping after performing the DFT operation. 
 
     
     
       2. The method of  claim 1 , wherein for a given user equipment (UE), multiplexing, by the BS, a physical downlink control channel (PDCCH) and the PDSCH with the DFT-s-OFDM waveform in a time division multiplexing (TDM) manner prior to the DFT operation. 
     
     
       3. The method of  claim 1 , wherein the indicating by the BS includes using a starting and length indicator value (SLIV) to indicate the time domain resource allocation within the one OFDM symbol prior to the DFT operation. 
     
     
       4. The method of  claim 1 , wherein a starting physical resource block (PRB) position and the DFT size are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       5. The method of  claim 1 , wherein a starting physical resource block (PRB) position and a number of PRBs are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       6. The method of  claim 1 , wherein a starting physical resource block (PRB) position, a number of PRBs, or the DFT size is configured by higher layers via new radio (NR) remaining minimum system information (RMSI). 
     
     
       7. The method of  claim 1 , wherein a same DFT size is used for transmission of a physical downlink control channel (PDCCH) and the PDSCH. 
     
     
       8. A wireless communication apparatus, comprising:
 a base station (BS) configured to: 
 indicate a time domain resource allocation within one Discrete Fourier Transform (DFT) size in a downlink control information (DCI), wherein the one DFT size equals a number of subcarriers allocated for transmission within one Orthogonal Frequency Division Multiplexing (OFDM) symbol; and 
 transmit, following a DFT operation, a physical downlink shared channel (PDSCH) with a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform in accordance with the time domain resource allocation within the one DFT size; 
 multiplex a plurality of PDSCHs for one or more user equipments (UEs) in a time division multiplexing (TDM) manner; and 
 perform the DFT operation on the multiplexed plurality of PDSCHs, 
 wherein the BS performs a multiple-step resource allocation for the plurality of PDSCHs with the DFT-s-OFDM waveform, and 
 wherein prior to performing the DFT operation, determining, by the BS, a time resources allocation of modulated symbols for PDSCH transmission within the one DFT size, and determining, by the BS, a frequency domain resource allocation and resource mapping after performing the DFT operation. 
 
     
     
       9. The wireless communication apparatus of  claim 8 , for a given UE, the BS is configured to multiplex a physical downlink control channel (PDCCH) and the PDSCH with the DFT-s-OFDM waveform in a time division multiplexing (TDM) manner prior to the DFT operation. 
     
     
       10. The wireless communication apparatus of  claim 8 , wherein to indicate the time domain resource allocation includes using a starting and length indicator value (SLIV) to indicate the time domain resource allocation within the one OFDM symbol prior to the DFT operation. 
     
     
       11. The wireless communication apparatus of  claim 8 , wherein a starting physical resource block (PRB) position and the DFT size are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       12. The wireless communication apparatus of  claim 8 , wherein a starting physical resource block (PRB) position and a number of PRBs are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       13. The wireless communication apparatus of  claim 8 , wherein a starting physical resource block (PRB) position, a number of PRBs, or the DFT size is configured by higher layers via new radio (NR) remaining minimum system information (RMSI). 
     
     
       14. The wireless communication apparatus of  claim 8 , wherein a same DFT size is used for transmission of a physical downlink control channel (PDCCH) and the PDSCH. 
     
     
       15. A non-transitory computer-readable media (CRM) comprising computer instructions, where upon execution of the computer instructions by one or more processors of a base station (BS), causes the one or more processors to:
 indicate a time domain resource allocation within one Discrete Fourier Transform (DFT) size in a downlink control information (DCI); and 
 transmit, following a DFT operation, a physical downlink shared channel (PDSCH) with a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform in accordance with the time domain resource allocation within the one DFT size; 
 multiplex a plurality of PDSCHs for one or more user equipments (UEs) in a time division multiplexing (TDM) manner; 
 perform the DFT operation on the multiplexed plurality of PDSCHs, 
 wherein the BS performs a multiple-step resource allocation for the plurality of PDSCHs with the DFT-s-OFDM waveform, and 
 wherein prior to performing the DFT operation, determining, by the BS, a time resources allocation of modulated symbols for PDSCH transmission within the one DFT size, and 
 determine a frequency domain resource allocation and resource mapping after performing the DFT operation. 
 
     
     
       16. The non-transitory CRM of  claim 15 , wherein the one or more processors, prior to performing the DFT operation, determine a time resource allocation of modulated symbols for PDSCH transmission within the one DFT size and, after performing the DFT operation, determine a frequency domain resource allocation and resource mapping. 
     
     
       17. The non-transitory CRM of  claim 15 , wherein a starting physical resource block (PRB) position and the DFT size are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       18. The non-transitory CRM of  claim 15 , wherein a starting physical resource block (PRB) position and a number of PRBs are configured by higher layers via new radio (NR) minimum system information (MSI). 
     
     
       19. The non-transitory CRM of  claim 15 , wherein a starting physical resource block (PRB) position, a number of PRBs, or the DFT size is configured by higher layers via new radio (NR) remaining minimum system information (RMSI). 
     
     
       20. The non-transitory CRM of  claim 15 , wherein a same DFT size is used for transmission of a physical downlink control channel (PDCCH) and the PDSCH.